Mercedes-Benz Erase fault memory
Erase fault memory
Quick answer
For certain U.S. 2022–2025 Mercedes-Benz EQB and G-Class vehicles, “Erase fault memory” is a documented step in Mercedes-Benz communication LI54.10-P-079533 concerning DC/DC-converter-related sensor fault codes caused by faulty wake-up behavior. It is not, by itself, a confirmed vehicle fault diagnosis.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does Erase fault memory mean?
For certain U.S. 2022–2025 Mercedes-Benz EQB and G-Class vehicles, “Erase fault memory” is a documented step in Mercedes-Benz communication LI54.10-P-079533 concerning DC/DC-converter-related sensor fault codes caused by faulty wake-up behavior. It is not, by itself, a confirmed vehicle fault diagnosis.
2. Technical explanation
NHTSA Manufacturer Communication 11029977 (Mercedes-Benz LI54.10-P-079533, version 5, dated March 11, 2026) addresses DCDC223 sensor fault codes attributed to faulty wake-up behavior of the installed DC/DC converter. The communication applies to DC/DC converter types installed in model series 243 and 465. Its stated remedy for model 243 includes “Erase fault memory.” The supplied evidence does not establish the exact procedure, whether erasing memory alone resolves the condition, or whether this alert was displayed on a particular vehicle.
3. What system is affected?
DC/DC converter / 12-volt power-supply and voltage-converter function group (54.10).
4. How serious is this code?
Unknown. The supplied diagnostic record does not assign a severity.
5. Symptoms you may notice
- For model 243, the communication lists a red 12V battery message, a white HV warning message, and a warning message in the instrument cluster.
- For model 243 vehicles with BMS30EB02, a yellow HV drive-system warning may also be present.
- For model 465, the communication lists a red 12V battery message, a white HV warning message, and a warning message in the instrument cluster.
- The communication states that additional warning messages may occur if the initial messages are ignored during the same ignition cycle; the supplied evidence does not identify all of those additional messages.
6. Possible causes
- Faulty wake-up behavior of the DC/DC converter, associated in the communication with DCDC223 sensor fault codes.
- No other causes are established by the supplied verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Do not ignore red 12V battery, HV warning, HV drive-system, or instrument-cluster warning messages.
- Arrange Mercedes-Benz service if the documented warning messages occur.
- Do not attempt high-voltage or DC/DC-converter repair work yourself.
10. Step-by-step troubleshooting
- The verified communication identifies DCDC223 sensor fault codes and DC/DC converter wake-up behavior as the subject of diagnosis.
- Fault-memory erasure is documented as a remedy item for model 243 only.
- Further owner-level troubleshooting steps are not established by the supplied verified evidence.
11. When to contact service
Contact an authorized Mercedes-Benz service center if the listed warning messages or related DCDC223 sensor fault codes are present. Whether service is required is otherwise not established by the supplied diagnostic record.
12. What the service center may check
- Confirm whether the vehicle is a U.S. 2022–2025 Mercedes-Benz EQB or G-Class within the stated applicability.
- Check for DCDC223 sensor fault codes.
- Assess DC/DC converter wake-up behavior as described in LI54.10-P-079533.
- For model 243, apply the communication’s documented fault-memory-erasure remedy as appropriate.
- The supplied evidence does not establish the complete workshop procedure or software-update details.
13. Possible repair or resolution
- For model 243, LI54.10-P-079533 lists “Erase fault memory” as a remedy item.
- The communication states that software is also available for model 465, but the supplied evidence does not provide the software procedure, part number, calibration, or completion criteria.
- No additional repair resolution is established by the supplied verified evidence.
14. Affected vehicles
- Mercedes-Benz EQB · 2022–2025 · US
- Mercedes-Benz G-Class · 2022–2025 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication 11029977: Mercedes-Benz LI54.10-P-079533, version 5, dated March 11, 2026. Topic: DCDC223 sensor fault codes due to faulty wake-up behavior. The document concerns DC/DC converters in model series 243 and 465.
16. Recall information
- No recall is established by the supplied verified evidence.
17. Official manufacturer information
Official source: NHTSA Manufacturer Communication 11029977, Mercedes-Benz LI54.10-P-079533: https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2025-2026.zip#nhtsa_id=11029977
19. Frequently asked questions
What does “Erase fault memory” mean in this evidence?
It is listed as a remedy item for model 243 in Mercedes-Benz communication LI54.10-P-079533. The supplied evidence does not provide the detailed procedure.
Which vehicles are covered by the supplied applicability data?
U.S. 2022–2025 Mercedes-Benz EQB and G-Class vehicles. The communication refers to model series 243 and 465.
Is it safe to drive or charge?
Not yet established by verified evidence.
Does this confirm that the DC/DC converter has failed?
No. The communication concerns DCDC223 sensor fault codes and faulty wake-up behavior; the supplied evidence does not confirm DC/DC converter failure for an individual vehicle.